FAQ: ClinicalTrials.gov - Linking to ClinicalTrials.gov
Question: How do I link to ClinicalTrials.gov from my Web site?
The National Library of Medicine (NLM) invites you to link from your Web site to ClinicalTrials.gov.
If you link to this site, provide proper attribution to the U.S. National Library of Medicine (NLM) and ClinicalTrials.gov. It must be clear to users that ClinicalTrials.gov is providing the data. Use only real-time data provided by ClinicalTrials.gov to ensure that the most up-to-date and accurate information is provided to the public.
The text below shows you how to code your hypertext link to the ClinicalTrials.gov website. Paste the block of HTML code directly into your page.
Please observe the form of the ClinicalTrials.gov name, which should include an uppercase C and T, a lowercase g, no space between "Clinical" and "Trials", and be in italic letters.
ClinicalTrials.gov provides patients, family members, and members of the public easy and free access to information on clinical studies for a wide range of diseases and conditions.
Formulating Links to Search Fields
You can create links to individual search fields as shown below. For any multiword search terms (e.g. Alzheimer disease), spaces must be replaced with a "+" character. Unusual characters must be URL encoded.
- Linking by search terms:
Searching for Alzheimer disease studies in ClinicalTrials.gov
<a href="http://clinicaltrials.gov/search/term=alzheimer+disease">Alzheimer studies in <i>ClinicalTrials.gov</i></a>
- Linking by condition:
Linking to Diabetes studies in ClinicalTrials.gov
<a href="http://clinicaltrials.gov/search/condition=diabetes">Diabetes studies in <i>ClinicalTrials.gov</i></a>
- Linking by intervention:
Linking to fluoxetine studies in ClinicalTrials.gov
<a href="http://clinicaltrials.gov/search/intervention=fluoxetine">fluoxetine studies in <i>ClinicalTrials.gov</i></a>
- Linking by sponsor:
Linking to clinical studies sponsored by NHLBI in ClinicalTrials.gov
<a href="http://clinicaltrials.gov/search/sponsor=NHLBI">Clinical studies sponsored by NHLBI in <i>ClinicalTrials.gov</i></a>
You may also link directly to a specific study record based on the NCT number, the National Library of Medicine's (NLM) unique identifier for a record, located at the end of each record.
- Linking by NCT number:
Linking to Study of the Effects on Glucose on Cognition in Parkinson's Disease Patients
<a href="http://clinicaltrials.gov/show/NCT00004451">Study of the Effects of Glucose on Cognition in Parkinson's Disease Patients in <i>ClinicalTrials.gov</i></a>
The XML format of ClinicalTrials.gov protocol records may be viewed by appending a URL parameter "displayxml=true" to the end of a well-formed URL.
provides access to the XML format of study record NCT00001372.
You can view the DTD at http://clinicaltrials.gov/ct/gui/c/a1b/screen/ShowDTD?JServSessionIdzone_ct=gtc2401ou1Additional Resource Information on clinical trials can be found at http://clinicaltrials.gov/info/resources
- Related Questions:
- ClinicalTrials.gov questions